APA (7th ed.) Citation

Krehbiel, H. E. (2004). A Book of Operas: Their Histories, Their Plots, and Their Music. Project Gutenberg.

Chicago Style (17th ed.) Citation

Krehbiel, Henry Edward. A Book of Operas: Their Histories, Their Plots, and Their Music. Project Gutenberg, 2004.

MLA (9th ed.) Citation

Krehbiel, Henry Edward. A Book of Operas: Their Histories, Their Plots, and Their Music. Project Gutenberg, 2004.

Warning: These citations may not always be 100% accurate.